Automatic switch.



l. N. REYNOLDS.

AUTOMATIC SWITCH.

APPucmon mw nec. 21. wxs.

1,131,734: there is an JOHN NEWBEBBY REYNOLDS, 0F GREENWICH, CONNECTICUT, ASSIGNOB TO WESTERN ELECTRIC COMPANY, INCORPORATED, 0F NEW YORK,

new Your.

N. Y., A CORPORATION 0F AUTOMATIC SWITCH.

Specification o! Letters Yatent.

Patented Aug. 28, 1917.

Application tiled December 27, 1916. Serial No. 139,087.

To all 'whom it may concern.-

Be it known that I, JOHN Nnwnimr REYN- oLDs, a citizen of the United States, resid-l ing at Greenwich, in the county of Fairiield and State of Connecticut, have invented certain new and useful Improvements in Automatic Switches, of which the following is a full, clear, concise, and exact description.

This invention relates to telephone switch mechanisms, and more particularly to improvements in switch mechanisms shown in my Patent No. 1,131,734, March 16, 1915, in which circuit connections are established through the agency of two sets of relatively movable contactmembers carried by movable bars termed trunk and line bars. The trunk hars are arranged to be selectively displaced to bring their contacts into position to be engaged by contacts upon a line bar. The engagement between contacts of an operated line har and trunk bar causes said trunk bar to be swung to a position where the contactswill be out of engagement with contacts of subsequently operated line bars. In the switch shown in the Patent No. rindividual operating etior each line bar. heobject of this invention is to simplify the structure andimprove the operation of such switches;

In accordance with the general features of this invention, there is provided a common operating bar for the line bars with al single magnet, which in the operation of the switch is operated to .move the common operating ar. Y l

The' drawing is a perspective view,with parts broken away, of a switch Vbodying the features of this invention. A

Referring to the drawing, 1 representsJ frame, only portions of which are shown.

The trunk bars (of which lonly one s shown), are 'pivotally mounted in 'the lop* and botto'm of the ramei Eachftrunlr -bar comprises a tubular member 2, to onevsidefA of which are firmly secured strips ofiins'ulation alternated with strips of conducting ma teriaLor contact membersi. Eachprcontact member carries a plurality.4 of eontacts 4V which are arranged in sets withthe; contacts of the other'membexs on the'sam bar. Each tubular member has an extensionf which forms .an armature of amagnet 9,jindividual to -each trunk bar, for the con-` ,tive position.

tactsof said 'trunk haninto an' operative position. a

Line bars 6 6, which are adapted to cooperate with these trunk bars, are made in skeletonized forin and each comprises a pair of side-supporting members between which are located the current conducting members. The conducting members are separated from each other and from the side-supporting members by means of insulating strips. Projecting i strips are the contacts 7-7.

One end of a line -bar` 6 is supported by a simple voted link 10, one end of which is attache to the line bars by a pivot pin 12',

and the other to the frame 1 by the pivot pin f 12. At the opposite end of the line bar there is a link 11, pivotally mounted to the frame 1 by means of a pivot 'pin 13. One end of the link 11 is. attached-to the line' bar 6, while another end thereof is provided with a pin 37. A swinging plate 14= is mounted on this pinl and arranged to berotated against the action of spring 15 by means of a rod 16 attached to an armature 17 of a line magnet 8 4to move said plate into a position to be engaged by anv arm of a commonoperating bar 18. y erating bar -18 is arranged gto be moved longitudinally'in the frame I y a common bar magnet 19. .Magnet 8 in attracting its armature, closes a circuit for thecommon bar from each of the conductingV The common opmoves the common operating bar 18-u`pward.

The bar-118 engages the plate 14 which has been operated .by' a' -line magnet and moves the line bar, associated with this plate 14, inwardly Vand upwardly into engagement with contacts of a displaced trunk b'a'rf.

Link 11is provided withan extensionarm 21 which serves as an magnet 22 when the line bar'isin its opera- 'Magnet- .22, whenA energized, serves to' keep the a1m attracted, thereby kee ing the linebar in its o eratedpositon. he o eration of the switc ingmechanism embodyirgthe features' of this vii'ivention is briefly ,as follows: A' preselected; trunk bar will beset or1 moved to a' displaced position by reason of the energiiation-of its indiin such `displaced position temporarily in the 'scriber at s bstation A armature of a holding.

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`What ,is claimed is:

from the hook, a line magnet 8 correspc.' ing to said substation will become energia: over the following circuit: grounded batter y, line magnet 8, conductor23, springs 24 and 2.3, conductor 2G, telephone apparatus at the substation A, conductor 27, springs 28 and 29 to ground. Relay 8 attracts its arma# ture 17, which Jositions the plate 14 of the line bar indivi ual to the calling line. Armature 17 closes the springs 30 and 31, which completes the following circuit: grounded battery,' prngs"80 and 3l, conductor 32, common bar magnet 19 to ground. Magnetlgttracts itsarrnature 20 which moves the'common'operating bar 18 upward. By this movement of the ,bar a projection 50 engagesn the positioned plate 14 corresponding-tothe calling line, and causes the line bar 6' lassociated therewith to be moved inwardly and upwardly to bring contacts thereon into engagement with contacts of the displaced'trunk bar, and also-tobring arm 21 of the lever 11 into operative relathe contacts of a displaced trunk bar, a

magnet 22 i's as follows: groun'c ed battery, resistance 33, conductor 34, inner contact member 3, inner left-hand trunk 'contact 4, inner left-hand line contact 7, conductor35, 'magnet 22 to ground. Magnet 22 becomes energized and retains arm 21 in its operated position. Arm 1 in its operated position` opens the contacts 28, 29 and 24,' 25, thereby opening the circuit of relay readiness to establish another connection;

Upon the calling subscriber hanging up his receiver at the termination of the conversation, the current of magnet 22 is interrupted and thedenergization of the ma et allows thegarm- 21 to drop by means o its own weight and.' spring 15 to its normal position, thus, returning the line bar and the terminals ,thereon to their normal positions.

1. In a connecting switch, a plurality of trunk basycontacts onlsaicL trunk bars a. plurality'of line bars, contacts on said line ars arranged to, engage the contacts of said trn'nk bars,`means for said trunk barsinto position-tb have its contacts engaged by contacts of said line'b'ars, an an operating bar common to all oil said line bars for moving a line barin'to an perative position to engage with itscontacts the contacts of adis'placed trunk bar. i

2. In a iconnectingrsvgitch., aplurality of trunk| bars, contacts on said trunk bars' a plurality of line bars, contacts on said line ars arranged to engagethe contacts of said completed' .tru

displacing each of trunk bars, means for displacing each of said trunk bars into position to have its contacts engaged by contacts of said line bars, an operating bar common to all of said line bars for moving a line bar intoan operative position to engage with its contacts the contacts of a displaced trunk bar, and an electromagnet for operating Said operating bar. In aconnecting switch a plurality of trunk bars, contacts on sai trunk bars, a lurality of line bars, contacts on said lline iiars arranged to engage the contacts on said ars for moving a line bar .into an operative tacts of a displaced tru bar, and individual to each line bar for associating it with the common operating bar.

4. In a connecting-switch, a plurality of trunk bars, contacts on said trunk bars, a plurality of line bars, contacts on said line ars arranged to engage the contacts on said trunk bars, means for displacing each of said trunk bars into position to have its contacts engaged by contacts of said line bars, an operating bar common to all of said line bars for moving aline bar into an operative position to en age with tacts of a disp aced trunk bar, and a magnet individual to each .line bar for associating it with the common operating bar.

5. In a connecting switch a plurality of trunk bars, contacts on said trunk hars2 a plurality of line bars, contacts .on said Ime bars arranged to enga the contacts of Said trunk bars, means for isplacing each 0f Said trunketcilarnto positign tflgebits contacts engag contacts o sai e nn-o erating bar common to all of saillline bags f or moving aline bar into an operative position to engage with its tacts of a displaced trunk bar, an electromagnet for o erating said o erating bar, and means in lividual to each e bar operated when said position for holdin .said line bar 1n its operative position am? for releasingsaidoperatingbar. A j v H 6. In a connecting switch a. plurality of bars, contacts on'sai trunk bars, a. pluralityof line bars,

operating bar common to all of said line bars for moving a line bar into an operative position to engage with its" contacts the contacts of a. displaced trunk bar, an electromagnet'for o eratin said. operating bar, and meansin ividl'iafto each line bar foi` controlling said electromagnet.

its contacts the con-A I position to engage with ixticontacts theconcontacts the con- I line bar reaches its operative I 7. In a connecting switch, a plurality of trunk bars, contacts on said trunk bars, a plurality of line bars, contacts on said line bars arranged to eng-.ige the contacts of said trunk bars,'1neans for displacing each of said trunk bars into position to have its contacts engaged by contacts of said line bars, an operating bar common to all of said line bars for moving a line bar intofan operative position to engage with its contacts the contants of a displaced trunk bar, a swinging plate associated with each line bar, an electroinagnet individual to each of said line bars for displacing the plate associated with the corresponding line bar, projections on said common operating bar arranged to engage the displaced plate, and an electromagnet for operating said common operating bar.

8. In la connecting switch, a trunk bar, coutactson said trunk bar, a line, a movable line bar connected to said line, contacts on said line bar arranged to engage contacts of i Said .trunk bar, means actuated upon the initiation of a call on said line for moving said line bar to enga e with its contacts the contacts of said trun r bar, and means operated upon the engagement of said contacts for holding said hne bar in its operated p0- sition.

9. In a connecting switch, a trunk bar, contacts on said trunk bar, a line, a movable line bar connected to said line, contacts on said line bar arranged to enga e contacts o said trunk bar, means actuat upon the initiation of a call on said line for moving said line bar to engage with its contacts the contacts of said trunk bar, an arm connected to said line bar arranged to disconnect said first mentioned means when said line -bar reaches its operated position, and means operated upon the engagement of said contacts forliolding said line bar and said arm in their operated position. l

In witness whereof, I hereunto-subscribe my naine this 26th day of December, A. D. 1916.

JOHN NEWBERRY REYNOLDS. 

